2 * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or (at
11 * your option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/ioport.h>
28 #include <linux/kernel.h>
29 #include <linux/list.h>
30 #include <linux/sched.h>
32 #include <linux/device.h>
33 #include <linux/proc_fs.h>
34 #include <linux/acpi.h>
35 #include <linux/slab.h>
36 #include <linux/regulator/machine.h>
38 #include <asm/mpspec.h>
40 #include <linux/pci.h>
41 #include <acpi/acpi_bus.h>
42 #include <acpi/acpi_drivers.h>
43 #include <acpi/apei.h>
44 #include <linux/dmi.h>
45 #include <linux/suspend.h>
49 #define _COMPONENT ACPI_BUS_COMPONENT
50 ACPI_MODULE_NAME("bus");
52 struct acpi_device *acpi_root;
53 struct proc_dir_entry *acpi_root_dir;
54 EXPORT_SYMBOL(acpi_root_dir);
56 #define STRUCT_TO_INT(s) (*((int*)&s))
60 #ifdef CONFIG_ACPI_CUSTOM_DSDT
61 static inline int set_copy_dsdt(const struct dmi_system_id *id)
66 static int set_copy_dsdt(const struct dmi_system_id *id)
68 printk(KERN_NOTICE "%s detected - "
69 "force copy of DSDT to local memory\n", id->ident);
70 acpi_gbl_copy_dsdt_locally = 1;
75 static struct dmi_system_id dsdt_dmi_table[] __initdata = {
77 * Invoke DSDT corruption work-around on all Toshiba Satellite.
78 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
81 .callback = set_copy_dsdt,
82 .ident = "TOSHIBA Satellite",
84 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
85 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
91 static struct dmi_system_id dsdt_dmi_table[] __initdata = {
96 /* --------------------------------------------------------------------------
98 -------------------------------------------------------------------------- */
100 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
102 acpi_status status = AE_OK;
108 /* TBD: Support fixed-feature devices */
110 status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device);
111 if (ACPI_FAILURE(status) || !*device) {
112 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
120 EXPORT_SYMBOL(acpi_bus_get_device);
122 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
123 unsigned long long *sta)
127 status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
128 if (ACPI_SUCCESS(status))
131 if (status == AE_NOT_FOUND) {
132 *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
133 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
139 int acpi_bus_get_status(struct acpi_device *device)
142 unsigned long long sta;
144 status = acpi_bus_get_status_handle(device->handle, &sta);
145 if (ACPI_FAILURE(status))
148 STRUCT_TO_INT(device->status) = (int) sta;
150 if (device->status.functional && !device->status.present) {
151 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
152 "functional but not present;\n",
154 (u32) STRUCT_TO_INT(device->status)));
157 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
159 (u32) STRUCT_TO_INT(device->status)));
162 EXPORT_SYMBOL(acpi_bus_get_status);
164 void acpi_bus_private_data_handler(acpi_handle handle,
169 EXPORT_SYMBOL(acpi_bus_private_data_handler);
171 int acpi_bus_get_private_data(acpi_handle handle, void **data)
173 acpi_status status = AE_OK;
178 status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
179 if (ACPI_FAILURE(status) || !*data) {
180 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
187 EXPORT_SYMBOL(acpi_bus_get_private_data);
189 /* --------------------------------------------------------------------------
191 -------------------------------------------------------------------------- */
193 static int __acpi_bus_get_power(struct acpi_device *device, int *state)
196 acpi_status status = 0;
197 unsigned long long psc = 0;
199 if (!device || !state)
202 *state = ACPI_STATE_UNKNOWN;
204 if (device->flags.power_manageable) {
206 * Get the device's power state either directly (via _PSC) or
207 * indirectly (via power resources).
209 if (device->power.flags.power_resources) {
210 result = acpi_power_get_inferred_state(device, state);
213 } else if (device->power.flags.explicit_get) {
214 status = acpi_evaluate_integer(device->handle, "_PSC",
216 if (ACPI_FAILURE(status))
221 /* TBD: Non-recursive algorithm for walking up hierarchy. */
222 *state = device->parent ?
223 device->parent->power.state : ACPI_STATE_D0;
226 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n",
227 device->pnp.bus_id, *state));
233 static int __acpi_bus_set_power(struct acpi_device *device, int state)
236 acpi_status status = AE_OK;
237 char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' };
239 if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
242 /* Make sure this is a valid target state */
244 if (state == device->power.state) {
245 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
250 if (!device->power.states[state].flags.valid) {
251 printk(KERN_WARNING PREFIX "Device does not support D%d\n", state);
254 if (device->parent && (state < device->parent->power.state)) {
255 printk(KERN_WARNING PREFIX
256 "Cannot set device to a higher-powered"
257 " state than parent\n");
264 * On transitions to a high-powered state we first apply power (via
265 * power resources) then evalute _PSx. Conversly for transitions to
266 * a lower-powered state.
268 if (state < device->power.state) {
269 if (device->power.flags.power_resources) {
270 result = acpi_power_transition(device, state);
274 if (device->power.states[state].flags.explicit_set) {
275 status = acpi_evaluate_object(device->handle,
276 object_name, NULL, NULL);
277 if (ACPI_FAILURE(status)) {
283 if (device->power.states[state].flags.explicit_set) {
284 status = acpi_evaluate_object(device->handle,
285 object_name, NULL, NULL);
286 if (ACPI_FAILURE(status)) {
291 if (device->power.flags.power_resources) {
292 result = acpi_power_transition(device, state);
300 printk(KERN_WARNING PREFIX
301 "Device [%s] failed to transition to D%d\n",
302 device->pnp.bus_id, state);
304 device->power.state = state;
305 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
306 "Device [%s] transitioned to D%d\n",
307 device->pnp.bus_id, state));
314 int acpi_bus_set_power(acpi_handle handle, int state)
316 struct acpi_device *device;
319 result = acpi_bus_get_device(handle, &device);
323 if (!device->flags.power_manageable) {
324 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
325 "Device [%s] is not power manageable\n",
326 dev_name(&device->dev)));
330 return __acpi_bus_set_power(device, state);
332 EXPORT_SYMBOL(acpi_bus_set_power);
335 int acpi_bus_init_power(struct acpi_device *device)
343 device->power.state = ACPI_STATE_UNKNOWN;
345 result = __acpi_bus_get_power(device, &state);
349 if (device->power.flags.power_resources)
350 result = acpi_power_on_resources(device, state);
353 device->power.state = state;
359 int acpi_bus_update_power(acpi_handle handle, int *state_p)
361 struct acpi_device *device;
365 result = acpi_bus_get_device(handle, &device);
369 result = __acpi_bus_get_power(device, &state);
373 result = __acpi_bus_set_power(device, state);
374 if (!result && state_p)
379 EXPORT_SYMBOL_GPL(acpi_bus_update_power);
382 bool acpi_bus_power_manageable(acpi_handle handle)
384 struct acpi_device *device;
387 result = acpi_bus_get_device(handle, &device);
388 return result ? false : device->flags.power_manageable;
391 EXPORT_SYMBOL(acpi_bus_power_manageable);
393 bool acpi_bus_can_wakeup(acpi_handle handle)
395 struct acpi_device *device;
398 result = acpi_bus_get_device(handle, &device);
399 return result ? false : device->wakeup.flags.valid;
402 EXPORT_SYMBOL(acpi_bus_can_wakeup);
404 static void acpi_print_osc_error(acpi_handle handle,
405 struct acpi_osc_context *context, char *error)
407 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
410 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
411 printk(KERN_DEBUG "%s\n", error);
413 printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
414 kfree(buffer.pointer);
416 printk(KERN_DEBUG"_OSC request data:");
417 for (i = 0; i < context->cap.length; i += sizeof(u32))
418 printk("%x ", *((u32 *)(context->cap.pointer + i)));
422 static acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
425 static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
426 24, 26, 28, 30, 32, 34};
428 if (strlen(str) != 36)
429 return AE_BAD_PARAMETER;
430 for (i = 0; i < 36; i++) {
431 if (i == 8 || i == 13 || i == 18 || i == 23) {
433 return AE_BAD_PARAMETER;
434 } else if (!isxdigit(str[i]))
435 return AE_BAD_PARAMETER;
437 for (i = 0; i < 16; i++) {
438 uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
439 uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
444 acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
447 struct acpi_object_list input;
448 union acpi_object in_params[4];
449 union acpi_object *out_obj;
452 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
456 if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
458 context->ret.length = ACPI_ALLOCATE_BUFFER;
459 context->ret.pointer = NULL;
461 /* Setting up input parameters */
463 input.pointer = in_params;
464 in_params[0].type = ACPI_TYPE_BUFFER;
465 in_params[0].buffer.length = 16;
466 in_params[0].buffer.pointer = uuid;
467 in_params[1].type = ACPI_TYPE_INTEGER;
468 in_params[1].integer.value = context->rev;
469 in_params[2].type = ACPI_TYPE_INTEGER;
470 in_params[2].integer.value = context->cap.length/sizeof(u32);
471 in_params[3].type = ACPI_TYPE_BUFFER;
472 in_params[3].buffer.length = context->cap.length;
473 in_params[3].buffer.pointer = context->cap.pointer;
475 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
476 if (ACPI_FAILURE(status))
480 return AE_NULL_OBJECT;
482 out_obj = output.pointer;
483 if (out_obj->type != ACPI_TYPE_BUFFER
484 || out_obj->buffer.length != context->cap.length) {
485 acpi_print_osc_error(handle, context,
486 "_OSC evaluation returned wrong type");
490 /* Need to ignore the bit0 in result code */
491 errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
493 if (errors & OSC_REQUEST_ERROR)
494 acpi_print_osc_error(handle, context,
495 "_OSC request failed");
496 if (errors & OSC_INVALID_UUID_ERROR)
497 acpi_print_osc_error(handle, context,
498 "_OSC invalid UUID");
499 if (errors & OSC_INVALID_REVISION_ERROR)
500 acpi_print_osc_error(handle, context,
501 "_OSC invalid revision");
502 if (errors & OSC_CAPABILITIES_MASK_ERROR) {
503 if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE]
513 context->ret.length = out_obj->buffer.length;
514 context->ret.pointer = kmalloc(context->ret.length, GFP_KERNEL);
515 if (!context->ret.pointer) {
516 status = AE_NO_MEMORY;
519 memcpy(context->ret.pointer, out_obj->buffer.pointer,
520 context->ret.length);
524 kfree(output.pointer);
526 context->ret.pointer = NULL;
529 EXPORT_SYMBOL(acpi_run_osc);
531 bool osc_sb_apei_support_acked;
532 static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
533 static void acpi_bus_osc_support(void)
536 struct acpi_osc_context context = {
537 .uuid_str = sb_uuid_str,
540 .cap.pointer = capbuf,
544 capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
545 capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
546 #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
547 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
548 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT;
551 #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
552 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
556 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT;
557 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
559 if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
560 u32 *capbuf_ret = context.ret.pointer;
561 if (context.ret.length > OSC_SUPPORT_TYPE)
562 osc_sb_apei_support_acked =
563 capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT;
564 kfree(context.ret.pointer);
566 /* do we need to check other returned cap? Sounds no */
569 /* --------------------------------------------------------------------------
571 -------------------------------------------------------------------------- */
573 #ifdef CONFIG_ACPI_PROC_EVENT
574 static DEFINE_SPINLOCK(acpi_bus_event_lock);
576 LIST_HEAD(acpi_bus_event_list);
577 DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue);
579 extern int event_is_open;
581 int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data)
583 struct acpi_bus_event *event;
584 unsigned long flags = 0;
586 /* drop event on the floor if no one's listening */
590 event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC);
594 strcpy(event->device_class, device_class);
595 strcpy(event->bus_id, bus_id);
599 spin_lock_irqsave(&acpi_bus_event_lock, flags);
600 list_add_tail(&event->node, &acpi_bus_event_list);
601 spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
603 wake_up_interruptible(&acpi_bus_event_queue);
609 EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4);
611 int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
615 return acpi_bus_generate_proc_event4(device->pnp.device_class,
616 device->pnp.bus_id, type, data);
619 EXPORT_SYMBOL(acpi_bus_generate_proc_event);
621 int acpi_bus_receive_event(struct acpi_bus_event *event)
623 unsigned long flags = 0;
624 struct acpi_bus_event *entry = NULL;
626 DECLARE_WAITQUEUE(wait, current);
632 if (list_empty(&acpi_bus_event_list)) {
634 set_current_state(TASK_INTERRUPTIBLE);
635 add_wait_queue(&acpi_bus_event_queue, &wait);
637 if (list_empty(&acpi_bus_event_list))
640 remove_wait_queue(&acpi_bus_event_queue, &wait);
641 set_current_state(TASK_RUNNING);
643 if (signal_pending(current))
647 spin_lock_irqsave(&acpi_bus_event_lock, flags);
648 if (!list_empty(&acpi_bus_event_list)) {
649 entry = list_entry(acpi_bus_event_list.next,
650 struct acpi_bus_event, node);
651 list_del(&entry->node);
653 spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
658 memcpy(event, entry, sizeof(struct acpi_bus_event));
665 #endif /* CONFIG_ACPI_PROC_EVENT */
667 /* --------------------------------------------------------------------------
668 Notification Handling
669 -------------------------------------------------------------------------- */
671 static void acpi_bus_check_device(acpi_handle handle)
673 struct acpi_device *device;
675 struct acpi_device_status old_status;
677 if (acpi_bus_get_device(handle, &device))
682 old_status = device->status;
685 * Make sure this device's parent is present before we go about
686 * messing with the device.
688 if (device->parent && !device->parent->status.present) {
689 device->status = device->parent->status;
693 status = acpi_bus_get_status(device);
694 if (ACPI_FAILURE(status))
697 if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
701 * Device Insertion/Removal
703 if ((device->status.present) && !(old_status.present)) {
704 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
705 /* TBD: Handle device insertion */
706 } else if (!(device->status.present) && (old_status.present)) {
707 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
708 /* TBD: Handle device removal */
712 static void acpi_bus_check_scope(acpi_handle handle)
715 acpi_bus_check_device(handle);
718 * TBD: Enumerate child devices within this device's scope and
719 * run acpi_bus_check_device()'s on them.
723 static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list);
724 int register_acpi_bus_notifier(struct notifier_block *nb)
726 return blocking_notifier_chain_register(&acpi_bus_notify_list, nb);
728 EXPORT_SYMBOL_GPL(register_acpi_bus_notifier);
730 void unregister_acpi_bus_notifier(struct notifier_block *nb)
732 blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb);
734 EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier);
739 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
741 static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
743 struct acpi_device *device = NULL;
744 struct acpi_driver *driver;
746 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
749 blocking_notifier_call_chain(&acpi_bus_notify_list,
750 type, (void *)handle);
754 case ACPI_NOTIFY_BUS_CHECK:
755 acpi_bus_check_scope(handle);
757 * TBD: We'll need to outsource certain events to non-ACPI
758 * drivers via the device manager (device.c).
762 case ACPI_NOTIFY_DEVICE_CHECK:
763 acpi_bus_check_device(handle);
765 * TBD: We'll need to outsource certain events to non-ACPI
766 * drivers via the device manager (device.c).
770 case ACPI_NOTIFY_DEVICE_WAKE:
774 case ACPI_NOTIFY_EJECT_REQUEST:
778 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
779 /* TBD: Exactly what does 'light' mean? */
782 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
786 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
790 case ACPI_NOTIFY_POWER_FAULT:
795 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
796 "Received unknown/unsupported notification [%08x]\n",
801 acpi_bus_get_device(handle, &device);
803 driver = device->driver;
804 if (driver && driver->ops.notify &&
805 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
806 driver->ops.notify(device, type);
810 /* --------------------------------------------------------------------------
811 Initialization/Cleanup
812 -------------------------------------------------------------------------- */
814 static int __init acpi_bus_init_irq(void)
816 acpi_status status = AE_OK;
817 union acpi_object arg = { ACPI_TYPE_INTEGER };
818 struct acpi_object_list arg_list = { 1, &arg };
819 char *message = NULL;
823 * Let the system know what interrupt model we are using by
824 * evaluating the \_PIC object, if exists.
827 switch (acpi_irq_model) {
828 case ACPI_IRQ_MODEL_PIC:
831 case ACPI_IRQ_MODEL_IOAPIC:
834 case ACPI_IRQ_MODEL_IOSAPIC:
837 case ACPI_IRQ_MODEL_PLATFORM:
838 message = "platform specific model";
841 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
845 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
847 arg.integer.value = acpi_irq_model;
849 status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL);
850 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
851 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
858 u8 acpi_gbl_permanent_mmap;
861 void __init acpi_early_init(void)
863 acpi_status status = AE_OK;
868 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
870 /* enable workarounds, unless strict ACPI spec. compliance */
872 acpi_gbl_enable_interpreter_slack = TRUE;
874 acpi_gbl_permanent_mmap = 1;
877 * If the machine falls into the DMI check table,
878 * DSDT will be copied to memory
880 dmi_check_system(dsdt_dmi_table);
882 status = acpi_reallocate_root_table();
883 if (ACPI_FAILURE(status)) {
884 printk(KERN_ERR PREFIX
885 "Unable to reallocate ACPI tables\n");
889 status = acpi_initialize_subsystem();
890 if (ACPI_FAILURE(status)) {
891 printk(KERN_ERR PREFIX
892 "Unable to initialize the ACPI Interpreter\n");
896 status = acpi_load_tables();
897 if (ACPI_FAILURE(status)) {
898 printk(KERN_ERR PREFIX
899 "Unable to load the System Description Tables\n");
905 /* compatible (0) means level (3) */
906 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
907 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
908 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
910 /* Set PIC-mode SCI trigger type */
911 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
912 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
915 * now that acpi_gbl_FADT is initialized,
916 * update it with result from INT_SRC_OVR parsing
918 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
922 status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
923 if (ACPI_FAILURE(status)) {
924 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
929 * If the system is using ACPI then we can be reasonably
930 * confident that any regulators are managed by the firmware
931 * so tell the regulator core it has everything it needs to
934 regulator_has_full_constraints();
943 static int __init acpi_bus_init(void)
946 acpi_status status = AE_OK;
947 extern acpi_status acpi_os_initialize1(void);
949 acpi_os_initialize1();
951 status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
952 if (ACPI_FAILURE(status)) {
953 printk(KERN_ERR PREFIX
954 "Unable to start the ACPI Interpreter\n");
959 * ACPI 2.0 requires the EC driver to be loaded and work before
960 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
963 * This is accomplished by looking for the ECDT table, and getting
964 * the EC parameters out of that.
966 status = acpi_ec_ecdt_probe();
967 /* Ignore result. Not having an ECDT is not fatal. */
969 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
970 if (ACPI_FAILURE(status)) {
971 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
976 * _OSC method may exist in module level code,
977 * so it must be run after ACPI_FULL_INITIALIZATION
979 acpi_bus_osc_support();
982 * _PDC control method may load dynamic SSDT tables,
983 * and we need to install the table handler before that.
987 acpi_early_processor_set_pdc();
990 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
991 * is necessary to enable it as early as possible.
993 acpi_boot_ec_enable();
995 printk(KERN_INFO PREFIX "Interpreter enabled\n");
997 /* Initialize sleep structures */
1001 * Get the system interrupt model and evaluate \_PIC.
1003 result = acpi_bus_init_irq();
1008 * Register the for all standard device notifications.
1011 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
1012 &acpi_bus_notify, NULL);
1013 if (ACPI_FAILURE(status)) {
1014 printk(KERN_ERR PREFIX
1015 "Unable to register for device notifications\n");
1020 * Create the top ACPI proc directory
1022 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
1026 /* Mimic structured exception handling */
1032 struct kobject *acpi_kobj;
1034 static int __init acpi_init(void)
1038 if (acpi_disabled) {
1039 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
1043 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
1045 printk(KERN_WARNING "%s: kset create error\n", __func__);
1049 init_acpi_device_notify();
1050 result = acpi_bus_init();
1056 pci_mmcfg_late_init();
1059 acpi_debugfs_init();
1060 acpi_sleep_proc_init();
1061 acpi_wakeup_device_init();
1065 subsys_initcall(acpi_init);